1. The extreme ultraviolet spectrum of the sun

   • Richard Tousey

   OriginalPaper Pages: 3 - 69

2. Type IV solar radio emission

   • A. D. Fokker

   OriginalPaper Pages: 70 - 90

3. The main phase of magnetic storms and the ring current

   • Syun-Ichi Akasofu

   OriginalPaper Pages: 91 - 135

4. Magnetic field of the earth and planets

   • J. W. Kern
   • E. H. Vestine

   OriginalPaper Pages: 136 - 171